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A pump can fill a tank with water in 2 hours. Because of a leak in the tank it was
taking 2 1 hours to fill the tank. The leak can drain all the water off the tank in : 3
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- 8 hours
- 7 hours
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4 1 hours 3 - 14 hours
- 8 hours
Correct Option: D
As per the given in question , we have
| Work done in 1 hour by the filling pump = | ||
| 2 |
| Work done in 1 hour by the leak and the filling pump = | ||
| 7 |
| ∴ Work done by the leak in 1 hour = | - | = | = | ||||
| 2 | 7 | 14 | 14 |
Hence, the leak can empty the tank in 14 hours.
